package jdbc;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {
    private static DruidDataSource dataSource = new DruidDataSource();

    static {
        dataSource.setUrl("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        dataSource.setUsername("root");
        dataSource.setPassword("root");
        dataSource.setMinIdle(1);//最小连接数
        dataSource.setMaxActive(20);//最大连接数
        dataSource.setInitialSize(5);//初始连接数
        /*未引入DRUID数据库连接池方法
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
         */
    }

    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();
        /*未引入DRUID数据库连接池方法
        return DriverManager.getConnection("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");
        */
    }
}
